Electric Jackhammer is one of the equipment used to repair concrete defect in our case. An electric jackhammer is an electromechanical tool that combines a hammer directly with a chisel. It is used to hack off defected concrete to expose the existing steel bar in order for the repairing work to be continued. An electric jackhammer that plugs into a 120 volts power source is normally used for this kind of work. Besides that, electric jackhammer is much more efficient and easier to use compare to sledgehammer. The jackhammer operates by driving an internal hammer up and down. The hammer is first driven down to strike the back of the bit and then back up to return the hammer to original position to repeat the cycle. There is few types of jackhammer bit could be selected based on the job. A point bit is designed to break the initial holes and get cracks started. While chisel bit break up large pieces and make more controlled breaks along a line.
Grouting Pump is another type of equipment used for repair concrete defect in our case. The non-shrink grout is mixed with water and pump to the place that need to be repair with the aid of this machine. The pump is coupled with gear motor. The inlet of the pump is connected through Hose Pipe to the outlet of twin grout mix preparation tank. At the outlet of the pipe a by-pass arrangement is provided for regulating pressure and volume of grout mix. The grouting hose pipe of required size is connected through quick action coupling at the outlet of the pump. The other end of grout hose is coupled with grouting nozzle. A pressure gauge is provided at the outlet of the pump to measure the grouting pressure.
1) Construction Machine, Available from:< http://www.indiamart.com/surfex/construction-machines.html> 2) Jackhammer,2013,Available from<http://en.wikipedia.org/wiki/Jackhammer>